
Taesu doesn’t have any particular qualities that should attract so many people to him. Sungdo's interest in him seemed random, and the psychopath from before clearly needed some mental help. The only person whose feelings I believe in is Junghyuk’s. The MCs’ shared past was cute, but honestly, Taesu was using Junghyuk, making him somewhat unlikable. That said, Junghyuk did help him deal with the bullies. While it’s fine for Junghyuk to receive pictures from Taesu’s mom, the candid photos feel a bit excessive. Overall, Junghyuk was relatively tame for a “stalker.” He wasn’t extreme, and it’s not like he knew Taesu’s location at all times. Either way, Taesu realized he likes him back so that’s great.

I can kinda see where you're coming from, but honestly - I truly think his aloofness is his main attractive feature + his face. It's basically all but said that he's looking wise attractive though not in his fashion, and he has the popular boy aloofness that attracts people. To be fair only two people liked him like that (with the psycho being 'obsessed" with him in a way that's in no way 'liking', but more of a 'want to have').
Dobin is out here thinking he is Sherlock Holmes when in reality he finally got a clue!